<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card class="box-card">
        <!-- 搜索与添加区域 -->
        <el-row :gutter="20">
          <el-col :span="8">
              <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
                  <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
              </el-input>
          </el-col>
          <el-col :span="4">
              <el-button type="primary" @click="dialogVisible">添加用户</el-button>
          </el-col>
        </el-row>

         <!-- 表格区域 -->
        <el-table :data="userList" border stripe>
          <el-table-column type="index"></el-table-column>
          <el-table-column prop="username" label="姓名"></el-table-column>
          <el-table-column prop="email" label="邮箱"></el-table-column>
          <el-table-column prop="mobile" label="电话"></el-table-column>
          <el-table-column prop="role_name" label="角色"></el-table-column>
          <el-table-column label="状态">
            <!-- 作用域插槽优先渲染,el-table-column的prop熟悉会被遮盖 -->
            <template slot-scope="scope">
              <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
            </template>
          </el-table-column>
          <el-table-column label="操作" width="180px">
            <!-- eslint-disable-next-line vue/no-unused-vars -->
            <template slot-scope="scope">
              <!-- 修改按钮 -->
              <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
              <!-- 删除按钮 -->
              <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteUserById(scope.row.id)"></el-button>
              <!-- 分配角色按钮 -->
              <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
              </el-tooltip>
            </template>
          </el-table-column>
        </el-table>

        <!-- 分页区域 -->
        <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum"
          :page-sizes="[1, 2, 5, 10]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper"
          :total="total">
        </el-pagination>
    </el-card>

    <!-- 添加用户的对话框 -->
    <el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主题区 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="addForm.password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="电话" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改 用户的对话框 -->
    <el-dialog title="修改用户信息" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <!-- 内容主题区 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="用户名">
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email"></el-input>
        </el-form-item>
        <el-form-item label="电话" prop="mobile">
          <el-input v-model="editForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色的对话框 -->
    <el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%"
     @close="setRoleDialogClosed">
      <div>
        <p>当前的用户: {{ userInfo.username }}</p>
        <p>当前的角色: {{ userInfo.role_name }}</p>
        <p>分配新的角色:
          <el-select v-model="selectRoleId" placeholder="请选择">
            <el-option v-for="item in rolesList" :key="item.id" :label="item.roleName" :value="item.id"></el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    // 验证邮箱格式
    const checkEmail = (rule, value, cb) => {
      const regEmail = /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/

      if (regEmail.test(value)) {
        // 合法邮箱
        return cb()
      }

      cb(new Error('请输入合法的邮箱'))
    }

    // 验证手机号格式
    const checkMobile = (rule, value, cb) => {
      const regMobile = /^(?:(?:\+|00)86)?1[3-9]\d{9}$/

      if (regMobile.test(value)) {
        // 合法邮箱
        return cb()
      }

      cb(new Error('请输入合法的手机号'))
    }

    return {
      // 获取用户列表的参数对象
      queryInfo: {
        query: '',
        // 当前页
        pagenum: 1,
        // 当前每页显示多少条数据
        pagesize: 2
      },
      userList: [],
      total: 0,
      addDialogVisible: false,
      // 添加用户的表单数据
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      addFormRules: {
        username: [
          { required: true, message: '请输入用户名称', trigger: 'blur' },
          { min: 3, max: 10, message: '用户名的长度在3~10个字符之间', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入用户密码', trigger: 'blur' },
          { min: 6, max: 15, message: '用户名的长度在6~15个字符之间', trigger: 'blur' }
        ],
        email: [
          { required: true, message: '请输入用户邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入用户手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      editDialogVisible: false,
      editForm: [],
      editFormRules: {
        email: [
          { required: true, message: '请输入用户邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入用户手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      // 控制分配角色对话框的显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配角色的用户信息
      userInfo: {},
      rolesList: [],
      // 已选中的角色id
      selectRoleId: ''
    }
  },
  created () {
    this.getUserList()
  },
  methods: {
    async getUserList () {
      const { data: res } = await this.$http.get('users', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取用户列表失败')
      this.userList = res.data.users
      this.total = res.data.total
      // console.log(res)
    },
    // 监听 pagesize 改变的事件
    handleSizeChange (newSize) {
      // console.log(newSize)
      this.queryInfo.pagesize = newSize
      this.getUserList()
    },
    // 监听 页码值 改变的事件
    handleCurrentChange (newPage) {
      // console.log(newPage)
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 监听 switch 开关状态的改变
    async userStateChanged (userInfo) {
      // console.log(userInfo)
      const { data: res } = await this.$http.put(`users/${userInfo.id}/state/${userInfo.mg_state}`)
      if (res.meta.status !== 200) {
        userInfo.mg_state = !userInfo.mg_state
        return this.$message.error('更新用户状态失败!')
      }
      this.$message.success('更新用户状态成功')
    },
    // 控制dialog的显示
    dialogVisible () {
      this.addDialogVisible = true
    },
    // 监听对话框关闭
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    addUser () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('users', this.addForm)

        if (res.meta.status !== 201) {
          this.$message.error('添加失败')
        }

        this.$message.success('添加成功')
        // 隐藏对话框
        this.addDialogVisible = false
        // 重新获取列表
        this.getUserList()
      })
    },
    // 展示 修改用户 的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get(`users/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }

      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改对话框关闭
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    editUser () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起修改用户信息的网络请求
        const { data: res } = await this.$http.put(`users/${this.editForm.id}`, {
          email: this.editForm.email,
          mobile: this.editForm.mobile
        })

        if (res.meta.status !== 200) {
          this.$message.error('修改用户信息并提交失败')
        }

        // 隐藏对话框
        this.editDialogVisible = false
        // 重新获取列表
        this.getUserList()
        this.$message.success('修改用户信息并提交成功')
      })
    },
    // 根据id删除对应的用户信息
    async deleteUserById (id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 如果用户确认删除用户， 则返回值为字符串 confirm
      // 如果用户取消了删除， 返回值为字符串 cancel
      // console.log(confirmResult)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      const { data: res } = await this.$http.delete(`users/${id}`)

      if (res.meta.status !== 200) {
        return this.$message.error('用户删除失败')
      }

      this.$message.success('删除用户成功')
      this.getUserList()
    },
    // 显示分配角色的弹框
    async setRole (userInfo) {
      this.userInfo = userInfo

      // 在展示对话框之前， 获取所有角色的列表
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }

      this.rolesList = res.data

      this.setRoleDialogVisible = true
    },
    // 分配用户角色权限
    async saveRoleInfo () {
      if (!this.selectRoleId) {
        return this.$message.error('请选择要分配的角色')
      }

      const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, { rid: this.selectRoleId })

      if (res.meta.status !== 200) {
        return this.$message.error('更新角色失败')
      }

      this.$message.success('更新角色成功')
      this.getUserList()

      this.setRoleDialogVisible = false
    },
    // 监听分配角色的对话框关闭
    setRoleDialogClosed () {
      this.selectRoleId = ''
      this.userInfo = {}
    }
  }
}
</script>

<style lang="less" scoped>
.el-pagination {
  margin-top: 15px;
}
</style>
